Mining machine



4 Sheets-She et 1 G. BODIN MINING MACHINE Filed Sept. 15. 1926 mm Wm bSept. 6, 1932..

fig-apt n, 1932.,

G. BODIN MINING MACHINE Filed Sept. 15. 1926 4 Sheets-Sheet 2 G. BODINMINING MACHINE Filed Sept. 13, 1926 Se t. 6, 1932.

4 Sheets-Sheet 3 Sept. 6, 1932.

G. Bopm MiNING MACHINE Filed se 't. 13, 1926 4 Sheets-Sheet 4 PatentedSept. 6, 1932 UNITED STATES:-

GEORGE Benin, or CHICAGO, ILLINOIS; AssIGNoRjmo GoonirAn MANuraornmne 7COMPANY, OF CHICAGO, ILLINOIS, A COER ORATIQN ILLINOIS l MINING MACHINEThis invention relates to. improvenients'in mining machines of theshortwall type, and has among other objects to provide a new andimproved mining machine of the. class-de "5 scribed of a low, compactconstruction having a novel arrangement of feeding and cutter chaindriving mechanism ivlierein the height of the motor substantiallydetermines the height of the machine, and wherein a pair of feedingdrums is provided formovin g them achine along the coal face, each ofWhich drums may be power driven at a high speed or lower variable speed,or' may operate as a retarding device.

My invention may be more clearly under-- stood with reference to theaccompanying drawings wherein:

Figure 1 is a top plan view t ama chine constructed in a-ccordancewvithmy invention and having the cover plate of the gear casing removed toshow the mechanism thereof;

Figure 2 is a View partial side elevation of the machine shown in Figurel with parts: broken away to show portions of the control mechanism;

Figure 3 is a view in partial elevation and in partial longitudinalcross-section as taken on the longitudinal axis oithe machine;

Figure 4 is a sectional view taken on line 4-4 ofFigure 1; v

Figure 5 is a sectional vieW taken on line- 5-5 of Figure 1;

Figure 6 is a sectional view of the mainframe section taken on line-6'6'of Figure 2 Figure is a transverse section showing the lever arran'ement of the interlocking clutch mechanism for the rope drums andFigure 8 is sectional view taken substantially on line 88 o'f'Figuro l.

Referring now in particular to the details oi the drawings, the deviceemhodying'my in venti'on comprises a motor 1(lhaving a main frame- 11extending forwardly therefrom, which main frame ser es as a support fora forwardly projecting chain carrying cutter bar 12-. The cutter bar 12is ofan ordinary construction ant. is provided With guides thercaroundadapted to guide a cutterchain 16 in an orbital path with respectthereto;

The motor 1560f any construction 12, and means tor expelling thecuttings to Application filed September13f1926. Seria-lno; 135,906.

but is herein p-reterably shown as, being an electric motor of minimum,vertical di-mensions so arranged that it is directly slidable on: itsbottomon the mine bottom, that its height substantially determines the:height of the machine. In the form: shown, the motor is provided with anarmature 13 supported on a longitudinally arranged a1 mature shaft Mhaving an armature pinion 15 keyed adjacentits-fiorward end for driving:the feed operatingand cutter chain driving. mechanism. Y

The frame 11 is detachably connectiblewith. theuiiorward endof the motorso it.- may readily be removed therefrom for repair and inspection ofparts, and is provided with asubstantialily horizontally disposed partiti-onf2r1 dividing said fire-me into; an upper-chamber '25 forsupporting: and hens-- ing the gear trains for driving the feeding andcutter driving mechanism from the-- motor 10, and a lower chamber 26which isprovided With a support. 20 depending from v, thepartition: 21for supporting the cutter bar the: retreating side of the machineduring. the cutting operation. 7

l/Vithreference toFigu-resQ to 6, inclusive, it beseen that inasmuchasthe cutter bar 1-2 intersects the motor 10:, the; cuttings; must beexpelled to one side or the other 0t saidmotorto'prevent the cutterchaimfrom carrying the cuttings back intoxthe kerfl Various mechanicalr'meansmay he provided for expel-ling the cuttingsfrom thechamhe-r 26'but I'herein prefer to expel the cuttings from saidchamber'bythe'aetion'of thecutter chain 16 itself. In order to expel the-cuttings, the chamber 26is" provided With-a side; Wall 17 closing the advance side thereof; Theside wall 17 extends rearwardlya'long' the chamber 26parallelto the pathof the'cutter chain '16 and spaced therefrom a sufiicient distanceto'permit clearance of' the" hits; in: said cutter chain. The side Wall1''? is curved in' corn formancewith thepath of the cutter chain 16 andis flared outwardly towards the retreat ing side o-f the machine andWithz'b sidewall 18; on the advance side of the machineforms an opening19 for the expulsion of the out:- we

tings from the chamber 26. Thus the cuttings expelled from the kerf bythe cutter chain 16 will be drawn into the chamber 26 by said cutterchain along the side wall 17 and will be expelled through the opening 19in said chamber by the action of said cutter 7 chain beyond theretreating side I of the machine.

Referring now in particular to the details of the feed operating andcutter chain driving mechanism and several of the novel features of myinvention, a longitudinallyextending shaft 27 is provided. Thelongitudinally extending shaft 27 has a spur pinion 28 keyed on itsrearward end which meshes with and is driven from the armature pinion15.

The longitudinally extending shaft 27 is 'arranged centrallyof thechamber and is supported in spaced bearings 29, 30, and 31 ina usualmanner. I;

A'bevel pinion 32 is freely mounted on the longitudinally extendingshaft 27 adjacent the rearward end of the bearing 30. The

face of the bevel pinion 32 extends towards the rearward end of themachine and said bevel pinion is provided with a rearwardly extendinghub 33 provided with clutch jaws 34 adapted to be engaged by clutch jaws35 carried b a slidin clutch member 36 feathered on t e shaft 2 Meansare provided for shifting the clutch 7 member 36 along the shaft 27 forselectively connecting the pinion 32 thereto, which means comprise acollar and fork shifting arrangement, indicated by reference character37 operated by a suitable hand lever 38 on the end of a transverselyextending shaft 39 man obvious manner.

vThe bevel pinion 32 meshes with and drives abevel gear 40 secured toa'vertically extending shaft 41. The lower portionof'the bevel gear 40,has suitable bearing engagement with Jcutter bar 12 in a usual manner.

The feed operating mechanism is driven from a worm keyed on thelongitudinally extending shaft 27 between the bearing members 30 and 31and meshing with and driving 1 a worm gear 51 keyed on a longitudinallyextendingsleeve 52, which sleeve,'in turn, is

freely mounted on a transversely'extending hollow shaft 53. The sleeve52 is journaled in suitable bearing supports adjacent opposite sidesof'the worm gear 51 and in a suit- The a casing 56 controlled by asuitable friction band 57 in a usual manner.

Clutch jaws 58 are provided on the end of the sleeve 52 within thecasing 56. The clutch jaws 58 are adapted to be connectible with thehollow shaft 53 for driving said hollow shaft at the speed of rotationof said sleeve in a manner which will hereinafter be more fullydescribed. Clutch jaws 59 are provided on a casing 62 rotatable withinthe casing 56 and driven from the sleeve 52 at areduced frictionallycontrolled speed by means of a sun gear (not shown) keyedthereto andplane tary pinions meshing with an internal gear connected with thecasing 56, and an internal gear connected withthe casing 62 in a usualmanner well known to those skilled in the art and not herein shown nordescribed in detail. The clutch jaws 59 are adapted to be connectiblewith the hollow shaft 53 for driving said hollow shaft at a relativelylow speed controlled by the friction band 57 The clutch jaws 58 and 59are selectively V connectible to the hollow shaft 53 for driving saidshaft at either a high speed or a lower frictionally controlled speed bymeans of a sliding clutch member 60 freely mounted on the shaft 53 andprovided with suitable clutch jaws thereon adapted to engage either theclutch jaws 58 or 59. The sliding clutch member 60 is operativelyconnected with the. hollow shaft 53 for driving said shaft by means of adriving member 61 connected to' opposite sides thereof and extendingthrough slots 64, 6-1- in opposite sides of the hollow shaft 53extending longitudinally thereof. The driving member 61 also extendsthrough and is operatively connected with a shifter rod 63 carriedwithin the hollow portion of the hollow shaft 53 for slidable movementwith respect thereto. The shifter rod 63 is slidably moved with respectto the shaft 53 by .means of a shifter collar 65 slidably mounted on thehollow shaft 53 beyond the end of the sleeve 52 and carrying a pin 66extending through suitable slots ext-ending longitudin ally of saidhollow shaft in opposite sides thereof and operatively connected withthe end of said shifter rod opposite from the driving member 61 (seeFigs; 2 and 5). The

collar 65 is, in turn, controlled in a suitable manner by means of ashifter member 68 connected with levers 69, 69 carried on a vertiw callyextending rocking shaft 7 O, which rocking shaft is, in turn,opera-ted'by means of a suitable hand lever indicated at 71.

It may thus be seen that when the clutch jaws 58 are engaged by theclutch jaws on the sliding clutch member 60, the shaft 58 is driven at ahigh rate of speed by means of said sliding clutch member and the d'iving member 61, and that when the clutch jaws 59 are engaged with theclutch jaws on the sliding clutch member 60, the shaft is driven at alower rate of speed in a similar manner.

Referring now in parti alar to the means for applying the friction band57 to the casing 56 for controlling the speed of rotation of the casing62, one end of said friction band is engaged by a suitable lug integralwith the main frame 11, as may clearly be seen with reference to Figure2, while the opposite end of said friction band is connected with a rearwardly extending connecting rod 96. The connecting rod 96 has itsopposite end pivotally connected to a lever arm 97 intermediate itsends. One end of the lever arm 9'? is pivotally connected to the mainframe 11 while the opposite end of saidlever arm is pivotally connectedto a rearwardly extending connecting rod 98 which extends through aportion of the casing for the motor 10 adj acent one side thereof andwhich has a hand wheel 99 threaded on its rearward end. Thus rotation ofthe hand wheel 99 in one direction or another engages the friction band57 with, or disengages said friction band from the casing 56 in anobvious manner for permitting the shaft 53 to be driven at a pluralityof relatively low variable speeds.

A spur pinion 7 2 is keyed on the end of the transversely extendingshaft 58 and meshes with and drives an idler gear 73 on a stud 74, whichidler meshes with and drives a spur gear 7 5 provided with a hub 77,which hub, in turn, is keyed on a transversely extending shaft 76. Thespur gear 75 is provided with a web portion 78 having aper-' tures 79, 79 extending therethrough. A. feed drum 86 is freely mounted on the hub77 and its rearward portion abuts the web portion 7 8 of the spur gear 75. Suitable means are provided for holding the feed drum 86 on the nib77 of the spur L5 which may be of any construction, but which is hereinshown as being a plate 87 held to the end of the transversely extendingshaft 76 by means of a suitable cap screw indicated at 88.

Means are provided for connecting the feed drum 86 with the gear 75 sosaid feed drum may be driven tiereby, which means herein comprise a.clutch member 82 mounted within the inner periphery of the spur gear '4"and having jaws 83 integral therewith and extending outwardly therefrom.The jaws 83 are adapted to register with the apertures 7 9 in the web 78of the spur 75 and in corresponding apertures the portion the feed drum88 which abuts the web 78 of the spur gear 75 (see Fig 8). The clutchmember 82 is shifted by means of suitable shifting mechanism which, asherein shown, comprise a. shifting member 84: having. an annular guideformed therein adapted to engage an inwardly extending shoulder on theclutch member 82 so said clutch member may be freely r0- tated withrespect to said shifting member (see Fig. 8). The shifting member 8a isadapted to be engaged by a forked member 90 keyed on a longitudinallyextending rock shaft 107. The rock shaft 107 is, in turn, operated by alever 110, which lever is oper ated by a suitable system of levers in aman ner which will hereinafter be more fully described. As the clutchmember 82 is moved longitudinally with respect to the shaft 76, theclutch jaws 83 may engage the apertures in the web. of the feed drum 86for driving said feed drum at either a high speed or a lower variablespeed, and when said clutch ,member' is moved in an opposite directionthe clutch jaws 83 are disconnected from the apertures in the web ofsaid feeddrum to permit said feed drum to freely rotate about the axisof the shaft 76.

A feed drum 100, constructed in a manner similar to the feed drum 86, isprovided with an inwardly extending hub 101, which hub is freely mountedon the opposite end of the transverse shaft 76 and supported on itsouterperiphery in suitable bearing supports formed integral with the, mainframe 11. The drum is held on the shaft 76 in the same manner that thedrum 86 is held on said shaft; as, for instance, a plate abutting theend of said shaft and hub" 101 of said drum and a suitable cap screw forholding said plate to the end of said shaft, 7 v

Means are provided for selectively connectthe feed drum 100 to the shaftY6 so said feed drum be driven therefrom, which means comprises clutchaws 102 formed integral with the inner end of'the hub 101 for said feeddrum, which clutch jaws are adapted to be engaged by clutch jaws 103formed integral with a sliding clutch member 10%: feathered on thetransversely extendin g shaft 78. The sliding clutch member 10% is movedlongitudinally with respect to the transversely extending shaft 76 bymeans of a shifting collar 105 and a forked shifting lever 106 securedto a longitudinally extending rock shaft 108. The rock shaft 108 isoperated by a suitable system of levers which will hereinafter bedescribed and is interlocked with the rock shaft 107 so only one drummay be d 'iven at a time.

The mechani m for operating the rock shafts 107 108 comprises aconnecting rod 111 connecting the lever arm with alever arm 109 keyed tothe rearward end of the rock shaft 107. The position of the lever arms110 and 109 with respect to each other is such that as the connectingrod 111 is drum 86 for driving said drum and the clutch jaws 103 aresimultaneously disengaged from the clutch jaws 102 and vice versa. Asuit' able crank and link mechanism, indicated at 112 in Figure 7,operatively connects the lever arm with a rock shaft 113. The rockshaft118 extends rearwardly from the crank and link mechanism 112through the casing for the motor 10 and has a hand wheel 11 1 keyed toits rearward end adjacent the rearward end of said motor casing. Thus asthe hand wheel 11% is turned in one direction or another, either thedrum 86 or 100 is operatively connected with the drive shaft 76, and theopposite drum is disconnected therefrom so as to be free to be movedthereabout as its respective feed rope is being paid off.

Inasmuch as the drums 86 and 100 are both adapted to act as eitherfeeding devices or retarding devices, both of said drums are providedwith suitable braking means so the rotation thereof may be retarded whendisconnected from the drive shaft 76 and when its respective feed ropeis being unwound. therefrom as the machine is being pulled across theface of the coal by the opposite feed drum. These means comprisesuitable brake bands 115, 115' adapted to engage suitable brake drumsformed integral with the inner sides of the feed drums 86 and 100,respectively. Each of these brake bands are operated in a similar mannerso the operation of one only will herein be described in detail.

One end of the brake band 115 is adapted to engage a suitable lugintegral with the main frame 11 while the opposite end of said brakeband is adapted to be engaged by an actuating rod116. The actuatin rod116 extends rearwardly from the brake band 115 through the casing forthe motor 10 and is provided with a forked nut 11? adjacent its rearwardend. The forked nut 117 has pivotal connection with one end of aleverarm 118. The lever arm 118 is so shaped as to be depressed adjacentits center and has its ends extending outwardly therefrom and ispivotally connected at its center to'a fulcrum member 119. The other endof the leverarm 118 is forked and is provided with suitable means provedtype of mining machine has been thereon for engaging a collar 120 formedintegral with a controlhandle 121. The control handle 121 is threaded ona threaded stud 122 so that rotation of said control handle inonedirection or another will tighten or loosen thebrake band 115 on itsrespective brake drum in an obvious manner. 7

It may now be seen that anew and improvided which is especiallyadaptedfor use in thin seams ofcoal, which machine is of av rugged andcompact construction and is so arranged as to provide means for adequatedisposal of the cuttings and provide a means whereby the machine may befed or retarded byeither one of a plurality of feed drums,

the imposition of undue strains on the feed ropes andvarious parts ofthe machine and that the device of my invention may be easily operatedby means of conveniently located feed operating and controlling leversand is so constructed as to provide a machine having a maximum amount ofefficiency which is operable in a minimum amount of vertical height. 7

While I have herein shown and described one embodiment of my invention,it will be understood that the arrangement and construction of thevarious parts may be altered without departing from the spirit and scopehereof. Furthermore, I do not wish to be construed as limiting myself tothe particular construction illustrated, excepting as it may bespecifically limited in the appended claims.

I claim as my invention: 7 1. In a mining machine, a frame, a motorrearwardly of said frame, a cutter bar having a cutter chain thereon, asprocket operably connected with said motor for driving said cutterchain, a transversely disposed feed driving member, at one end of saidframe, a

, pair of feed drums disposed on opposite sides provided with alongitudinally projecting.

cutter bar from the forward end'thereof, said housing being includedsubstantially within the vertical limits of said motor casing, feeddriving mechanism disposed in said housing and comprising a centrallydisposed drive shaft extending longitudinally of the machine above theplane of said motor shaft and operably connected thereto, a worm carriedby said drive shaft, a driving member transversely disposed at theforward end of said machine and having a variable speed transmissiondevice concentric therewith, a worm gear on said driving member engagingsaid worm, a second transverse shaft disposed in a plane below saiddrive shaft intermediiio ate said motor and first mentioned transversedriving member and operably driven thereby, and a pair of feed drumsdisposed at opposite ends of said last named shaft, each as sociatedwith flexible draft means.

3. In a mining machine of the class described, the combination of amotor having a horizontally disposed shaft, a casing fdr said motoradapted to rest on the mine floor; a housing located forwardly ofsaidm'otor provided with a longitudinally projecting cutter bar from theforward end thereof, said housing being included substantially Withinthe vertical limits of said motor easing, feed driving mechanismdisposed in said housing and comprising a centrally disposed drive shaftextending longitudinally of the machine above the plane of said motorshaft and operably connected thereto, a Worm carried by said driveshaft, a driving member transversely disposed at the forward end of saidmachine and having a variable speed transmission device concentrictherewith, a Worm gear on said driving member engaging said worm, asecond transverse shaft disposed in a plane below said drive shaftintermediate said motor and first mentioned transverse driving memberand operably driven thereby, a pair of feed drums disposed at oppositeends of said last named shaft, each as sociated with flexible draftmeans, and interlocking means for selectively engaging either of said.drums.

4; In a mining machine of the class described, the combination of aframe, a motor at the rear of said frame adapted to rest on the minebottom, a chain carrying cutter bar in ending from the forward end ofsaid 4 frame, and a feed driving mechanism disposed forwardly of saidmotor and included substantially Within the vertical limits thereof,said feed driving mechanism including a longitudinally disposed driveshaft driven said motor andhaving means at the forward end thereof fordriving a transverse driving iember disposed at the forward end of saidframe at a plurality of speeds through a planetary gear reduction devicemonnted'at one end of said driving member, a driving sprocket for saidcutter chain disposed on a vertical axis forwardly of said motorope'rably driven by gearing connections with said drive shaft, a pair offeed drums disposed on transverse axes on opposite sides of said frameintermediate said first mentioned transverse driving member and saiddrive sprocket axis, means operably connecting said feed drums with saidtransverse drivmg' member, and interlocking mechanism disposed rearwardof the drive sprocket axis and adapted to selectively engage either ofsaid feed drums with said last mentioned means.

5. In a mining machine, a frame, a motor, a chain carrying cutter bardriven said motor, feed driving mechanism including a we, r

pair of vvinding devices each being associated With flexible draftmeans, said winding de: vices being mounted on opposite ends ofatransversely disposed shaft; a centrally dis posed drive shaft extendingldngitudinally of the machine and cpcrably driven by said motor andhaving gearing connections With a transversely disposed feed drivingmember at the nest ofsaid frame, a planetary gear reduction deviceconcentric with said driv ing n' ien'i'ber and forwardly of fine ofsaid- Winding devices and adapted to selectively drive said feed drivingmember at a plurality (if speeds, gearing connections from the 0pposit-eend of said driving member for driving' said transverse shaft, saidgearing be disposed adjacent the other Winding de v1ce.- a v r 6'; Incoinbination with a mining machine adapted to be moved 0n its bottom n amine bottom, a motor including' a motor" casir'ig adapted to rest on amine bottoima-"franre forwardly of said mot-or having a c'utte'rb'arprojecting forwardly therefrom, a cutter chain on said cutter bar,driving means for said cutter chain including a drive sprocket on aVertical axis forwardly of said motor and selectively connc-tible'therewith, feeding" mechanism for said minin achine, for wardly of saidniotorand Within" the vertical limits of said motor includin a variable.

speed transmission device on the forward end of saidframe andhalvingriving connection With a single transverse shaft forwardly of thevertical axis of said ciitter chain sprocket nism'; and a feed'druni oneach end of said last mentioned transverse'shaft. p

" 7. a mmm'g nacnmaa fr" e, a motor rearwardljf cf said frame, motorsaid motor adapted to rest on the mine new; a cutter bar projectinforwardly of said frame, cutter chain for said cutter bar; driving meansfor: said cutter chain including" a cn'tter'chain s substantially the 7central portion of said fr inaa bevel gear on saidshaft and a bevelpinion selectively 'c'onnectib'le with said mater casing far for drivinsaid bevel gait-1+,feedingmedia b. IIISHT for said mining machineforwardly of said frame and Within the vertcica'l limits of said motorincluding a" variable speed trans-' mission device driven fromsaidm'oto-r and rotatable about an axis disposed transversely,

of'said frame on the forward portion of ,said frameand a feed-,drumhaving flexible feeding means connected thereto on each end of a'single transverse shaft selectively connectible vvith said variablespeed transmission device, said transverse shaft being forwardly: of thevertical axisqrsaid c itte'r chain sprocket and beneath said bevelterchain sprccket. W

8- I I am ningi fiad rearvv' rdly of said frame,

,af rim as a motor casingfor procliet on; a vertical shaft at gear itsdriving and cut .100 and rearwardlyof said variable speed mechasaidmotor adapted to rest on its bottom on a mine bottom, a cutter barprojecting forwardly of said frame, a cutter chain for said cutter bar,a longitudinal shaft connected with said motor and extendingsubstantially the length of said frame, a bevel pinion on said shaft andhaving selective connection therewith, a bevel gearconnected to saidbevel pinion and having driving connection with a cutter chain sprocketfor driving said cutter chain, a worm on the forward end of said shaftfor driving a worm gear on a transverse shaft at the forward end of saidframe, variable speed transmission gearing driven by said worm andhaving geared connection with a'transverse shaft rearwardly of saidvariable speed transmission gearing and beneath said bevel gear, saidtransverse shaft having a feed drum at each end thereof and selectivelyconnectible thereto, said feed drums being substantially within thevertical limits of said motor casing.

9. In a mining machine,'a substantially horizontal motor slidabledirectly on its bottom on the mine bottom and having its power shaftextending longitudinally of the machine, cutting mechanism driven bysaid motor shaftfrom one end thereof and includinga horizontal planechain carrying cutter bar disposed in planes which intersect said motor,feeding mechanism including a feed drum and a relatively rotatableretarding drum driven b the same, end of said motor and drivingmechanism for said drums and cutting mechanism comprising a cutter chaindrive sprocket rotatable about a vertical axis spaced closer to saidmotor than rotation of said drums, and a planetary geared reductiondevice rotatable about a ttransverse axis disposed forwardly of saiddrums. V

10. In a room and pillar mining machine, a motor slidable directly onits bottom on the mine bottom, the height og said motor substantiallydetermining the height of the machine, said motor having a power shaftextending longitudinally of the machine, a main frame disposed forwardlyof said motor having a chaincarrying cutter'bar extending forwardlytherefrom, feed operating mechanism 011 opposite sides of said mainframe comprising a plurality of feed drums rotatable about transverseaxes, and cutter chain and feed operating driving mechanism driven 7from the forward end of said motor comprising a longitudinally extendingshaft driven by said motor, cutter chain driving mechanism driven bysaid shaft comprising a cutter chain drive sprocket rotatable about avertical axis spaced closer to said motor than the axis of rotation ofsaid feed drums, and feed driving mechanism driven from saidlongitudinally disposed shaft comprising a planetary geared reductiondevice rotatable about the axis of a transverse axis disposed forwardly"of said drums. v y

11. In a room and pillar mining machine, a-motor slidable directly onits bottom on the mine bottom, the height of said motor substantiallydetermining the height of the machine, said motor having a powershaft'extending longitudinally of' the machine, a main frame disposedforwardly of said motor having a chain carrying cutter bar extendingforwardly therefrom, feed operat ing mechanism on opposite sides of saidmain frame comprising a plurality of feed drums rotatable abouttransverse'axes, and cutter chain and feed operating driving mechanismdriven from the forward end of said motor comprising a longitudinallyextending shaft driven by said motor, cutter chain driving mechanismdriven by said shaft comprising a cutter chain drive sprocket rotatableabout a vertical axis spaced closer to driven from said longitudinallydisposed shaft comprising a frictionally controlled planetary gearedreduction device rotatable about a transverse axis disposed forwardly ofsaid drums.

12. In a room and pillar mining machine, a motor slidable directly onits bottom on the mine bottom, the height of said motor substantiallydetermining the height of the machine, said motor having a power shaftextending longitudinally of the machine, a main frame disposed forwardly.of said motor having a chain carrying cutter bar extending forwardlytherefrom, feed operating mechanism onopposite sides of said main framecomprising a plurality of feed drums rotatable about transverse axes,and cutter chain and feed operating driving mechanism driven from theforward end of said motor comprising a longitudinally extending shaftdriven by said motor, cutter chain driving mechanism driven by saidshaft comprising a cutter chain drive sprocket rotatable about avertical axis spaced closer to said motor than the axis of rotation ofsaid feed drums, and feed driving mechanism driven from saidlongitudinally disposed shaft comprising a planetary geared reductiondevice rotatable about a transverse axis disposed forwardly of saiddrums, and means for operatively connecting either of said drums withsaid planetary geared reduction device whereby either of said drums maybe driven therefrom or rotate freely with respect ISO tor having a chaincarrying cutter bar ex tending forwardly therefrom, feed operatingmechanism 011 opposite sides of said main frame comprising a pluralityof feed drums rotatable about transverse axes, and cutter chain and feedoperating driving mechanism driven from the forward end of said motorcomprising a longitudinally extending shaft driven by said motor, cutterchain driving mechanism driven by said shaft comprising a cutter chaindrive sprocket rotatable about a vertical axis spaced closer to saidmotor than the axis of rotation, of id feed drums, and feed drivingmechanism driven from said longitudinally disposed shaft comprising aplanetary geared reduction device rotatable about a transverse axisdisposed forwardly of said drums, and means for operatively connectingeither of said drums with said planetary geared reduction device wherebyeither of said drums may be driven therefrom or rotate freely withrespect thereto and means for independently retarding the rotation ofeither of said drums when disconnected from said planetary gearreduction device.

. 14. In a room and pillar mining machine, a motor slidable directly onits bottom on the mine bottom,the height of said motor substantiallydetermining the height of the machine, said motor having a power shaftextending longitudinally of the machine, a

main frame disposed forwardly of said motor having a chain carryingcutter bar ex' tending forwardly therefrom, feed operating mechanism onopposite sides of said main frame comprising a plurality of feed drumsrotatable about a common transverse axis, and cutter chain and feedoperating driving mechanism driven from the forward end of said motorcomprising a longitudinally extending shaft driven by said motor, cutterchain driving mechanism driven by said shaft comprisinga cutter-chaindrive sprocket rotatable about avertical axis spaced closer to saidmotor than the axis of rotation of said feed drums, feed drivingmechanism driven from said longitudinally disposed shaft comprising africtionally controlled planetary geared reduction device rotatableabout a transverse axis disposed forwardly of said drums, and means forselectively connecting either of said drums with said planctary gearedreduction device whereby either of said drums may be driven thereby orallowed to freely rotate with respect thereto.

15. In a room and pillar mining machine, a motor slidable directly onits bottom on the mine bottom, the height of said motor substantiallydetermining the height of the machine, said motor having a power shaftextending longitudinally of the machine, a main frame disposed forwardlyof said motor having a chain carrying cutter bar ex tending forwardlytherefrom, feed operating mechanism onopp'osite" sides-:ofsaid main:frame: comprising; aplurality of feed drums rotatable about transverseaxes, and cutter chain and feed operating driving mechanism driven fromthe forward end ofsaid' motor comprising a longitudinally extendingshaft driven by said motor, cutter chain driving mechanism driven bysaid shaft comprising acutter chain drive sprocket rotatable about avertical axis spaced closer tosaid motorthan the axis of rotation ofsaid feed drums, and feed driving mechanism driven from saidlongitudinally disposed shaft comprising frictionally controlledplanetary geared re duction device rotatable"- axis disposed forwardlymeans for selectively connectingeither of" said drumswith said planetarygeared reduction device whereby either of said drums maybefldriventhereby or allowed to freely rotate with respect thereto, andmeans for independentlyretarding the rotation; of either of said drumswhen disconnected from said planetary gear reduction device I 16 Incombination with a roomand pillar mining machine having a motorslidablel directlyon its bottomon the mine bottomwh-ose heightsubstantially determines'the' height of the machine, a mainframe'fdisposed forward ly of said motor having achaincarryin-g cutterbar extending forwardly therefrom,- a vertically disposed shaft drivenby said motor and a sprocket on said shaft for driving said cutter chainabout" said cutter bar, a" transversely disposed shaft arrangedforwardly ofsaid vertically dispo-s'edsh'aft having a coaxial feeddrumarrangedateachendthereof for free rotation'wfth. respectthereto, andmeans for driving said shaft and feed drums from said motor comprisingtr -planet ary gear reduction device. 7

,17. In combination with a room and pillar mining machine; having amotor slidable directly on its bottom on the mine bottom whose heightsubstantially determines the height of the machine, a main framedisposed forwardly of said motor having a chain carryingcutter barextending forwardly therefrom, a vertically disposed shaft driven bysaidmotor and a sprocket on said shaft for driving said cutter chainabout said cutter bar, a transversely disposed shaft arranged forwardlyof said vertically disposed shaft having a coaxial feed drum arranged ateach end thereof for free rotation with respect thereto, and means fordriving said shaft and feed drums from said motor comprising a shaftdisposed forwardly of said transversely disposed shaft and havingdriving connection therewith, and a planetary gear reduc-' tion devicearranged coaxially with said second mentioned shaft and having drivingengagement therewith.

18. In combination with a room andpillar' i nnning machine having amotor slidable' di about a transverse m of said drums, and

thereto, and means for driving and feed drums from said motor comprisingrectly on its bottom on the mine bottom whose" height substantiallydetermines the height of the machine,a-ma1n frame disposed forwardly ofsaid motor havinga chain carrying outter bar extending forwardlytherefrom, a

a shaft disposed forwardlyof said transversely disposed shaft and havingdriving connection therewith, and a frictionallycontrolledplanetary gearreduction device arranged coaxially with said second mentioned shaft andhaving driving engagement therewith. I

19. In combination with a room and pillar mining machine having a motorslidable directly on its bottom on the mine bottom whose heightsubstantiallydetermines the height of the machine, a main frame disposedforwardly of said motor having a chain carrying outter bar extendingforwardly therefrom, a longitudinally extending shaft supported in saidmainframe, said motor havinga power shaft extending longitudinallythereof and having driving connection with said longitudinally extendingshaft, vertical shaft disposed intermediate theends of saidlongitudinally extending shaft, means for driving said vertical shaftfrom said longitudinally extending shaft and a sprocket on said vertical shaft fordriving said cutter chain, a transversely disposed shaftarranged forwardly of said vertically disposed shaft having a coaxialfeed drum arranged at each end thereof for free rotation with respectthereto, and means for driving said'shaft and; feed drums from saidlongitudinally disposed j shaft comprising a planetary gear reductiondevice.

v20. 7 In combination with a room and pillar mining machine having amotor slidable di rectly on its bottom on the mine bottom whose heightsubstantially determines the he ght of the machine, a main framedisposed forward- 1y of said motor having a chain carrying cutter barextending forwardly therefrom, a longitudinally extending shaftsupported. in said main frame, said motor having a power shaft extendinglongitudinally thereof and having driving connection w saidlongitudinally extendingshaft, a vertical shaft disposed termediate theends of said longitudina extending shaft, means for driving saidverticalshaft from longitudinally extend-- ing shaft and a sprocketron saidvertical shaft for driving said cutter chain, a transversely disposedshaft arranged forwardly of said vertically l disposed :shaft having acoaxial 21. in combination with a room and pillar min machine having amotor slidable directly on its bottom on the mine bottom whose heightsubstantially determines the height of the machine, amainframe disposedforwardly of said motor having a chain carrying cutter bar extendingforwardly therefrom, a longitudinally extending shaft supported in saidmain frame, said motor having a power shaft extendii 3' ion itudinallythereof and hav'ng driving conne l n with said longitudinally extendir't. cal shaft dispose-d intermediate the ends of said lone gituui iyextending shaft, mean's for driving said vertical shaft from saidlongitudinally extenrl' shaft and sprocket on said vertical shafordriving said cutter chain, a transversely disposed shaft arrangedforwardly of said vertically disposed shaft having a coaxial feed drumarranged at each thereof for free ro ion with respect thereto, and meansfor rl ring said shaft and feed drums from said longitudinally disposedshaft comprising a shaft disposed forwardly of said transverselyarranged sl1aft,ineans for driving said transversely disposed shaft fromsaid second mentioned shaft, and means for driving sale second mentionedshaft from said longitudinally extending shaft comprising a frictionallycontrolled planetary gear reduction device.

22. In combination with a room and pillar mining machine having a motorslidable di-' rectly on its bottom on the mine cottom wnose i. .1

height substantially determines the height of the machine, a main framedisposed forwardly of said motor and having a chain carrying cutter barextending forwardly therefrom, a longitudinally extendin shaft supportedin said main frame, said motor having a power shaft extendinglongrtudihah ly thereof and having driving connection withsaidlongitudinally extending shaft, a vertical shaft di posedintermediate the ends of said longitudinally extendin shaft, means fordriving said vertical shaft. from lid longitudinally extending shaft anda sprocket on said vertical shaf" for driving said cutter chain, atransversely disposed shaft arranged forwardly of said-verticallydisposed shaft" having a coaxial feed drum arranged at each one thereoffor free" rotation. with respect thereto, and -means for driving saidshaft and'feed drums from said longitudinally dis T from,

' having a coaxial feed posed shaft comprising a shaft disposedforwardly of said transversely arranged shaft, means for driving saidtransversely disposed shaft from said second mentionedshaft, and meansfor driving said second mentioned shaft from said longitudinallyextending shaft comprising a worm and worm gear drive and a planetarygear reduction device.

23. In combination with a room and pillar mining machine having a motorslidable directly on its bottom on the mine bottom whose heightsubstantially determines the height of the machine, a main framedisposed forwardly of said motor having a chain carrying cutter barextending forwardly therea longitudinally extending shaft supported insaid main frame, said motor having a power shaft extendinglongitudinally thereof and having driving connection with saidlongitudinally extending shaft, a vertical shaft disposed intermediatethe ends of said longitudinally extending shaft, means for driving saidvertical shaft from said longitudinally extending shaft and a sprocketon said vertical shaft for driving said cutter chain, a transverselydisposed shaft arranged forwardly of said vertically disposed shaft drumarranged at each end thereof for free rotation with respect thereto, andmeans for driving said shaft and feed drums from said longitudinallydisposed shaft comprising a-shaft disposed forwardly of saidtransversely arranged shaft, means for driving said transverselydisposed shaft from said second mentioned shaft, and means for drivingsaid second mentioned shaft from said longitudinally extending shaftcomprising a worm and worm gear drive and a frictionally controlledplanetary gear reduction device arranged coaxially with said secondmentioned shaft.

24. In combination with a room and pillar mining machine having a motorslidable directly on its bottom on the mine bottom whose heightsubstantially determines the height of the machine, a main framedisposed forwardly of said motor having a chain carrying cutter barextending forwardly therefrom, a longitudinally extending shaftsupported in said main frame, said motor having a power shaft extendinglongitudinally thereof and having driving connection wit saidlongitudinally extending shaft, a vertical shaft disposed intermediatethe ends of said longitudinally extending shaft, means for driving saidvertical shaft from said longitudinally extending shaft comprising abevel gear and pinion drive and a sprocket on said vertical shaft fordriving said cutter chain, a transversely disposed shaft arrangedforwardly of said vertically disposed shaft having a. coaxial feed drumarranged at each end thereof for free rotation with respect thereto, andmeans for driving said shaft and feed drums from said longitudinallydisposed shaft; comprising a shaft disposed forwardly of and parallelWlth said transverseshaft, a drive connection from said shaft to saidtransverse shaft, means for selectively connecting either of said feeddrums withsaid transverse shaft, and

nally extending shaft forwardly of said bevel gear and pinion dr1ve, aworm gear driven therefrom and a planetary gear reduction deviceinterposed between-said worm gear and said second mentioned parallelshaft.

25. In combination with a room and pillar mining'machin'e having a motorslidable directly on its bottom on the mine bottom whose heightsubstantially determines the height of the machine, a main framedisposed forwardly of said motor having a chain carrying cutter barextending forwardly therefrom, a longitudinally extending shaftsupported in said main frame, said motor having a power shaft extendinglongitudinally thereof and having driving connection with saidlongitudinally extending shaft, a vertical shaft disposed intermediatethe ends of said longitudinally extending shaft, means for driving saidvertical shaft from said lon gitudinally extending shaft comprising abevel gear and pinion drive anda sprocket on said vertical shaft fordriving: said cutter chain, a transversely disposed shaft arrangedforwardly of said vertically disposedshaft having a coaxial feed drumarranged at each end thereof for free rotation with respect thereto, andmeans for drivingsaid shaft and feed drums from said longitudinallydisposed gear driven therefrom and a frictionally con- V trolledplanetary gear reduction device driven by said worm gear and means forconnecting said planetary gear reduction device with said secondmentioned parallel shaft for driving said shaft at either a high speedor a low variable frictionally controlled speed.

26. In combination with a room and pillar mining machine having motorslidable directly on its bottom on the mine bottom whose heightsubstantially determines the height'of the machine, a main framedisposedforwardly of said motor having a chain carrying cutter bar extendingforwardly therefrom, a vertically disposed shaft driven by said motorand a sprocket on said shaft for driving said cutter chain about saidcutter bar, 1

conforming to the path means formed integral with said frame and of saidcutter chain: for closing the advance side of said mining: machine andpermitting the retracting side: thereof to remain open fordischargingthe cuttings therefrom, a transversely disposed shaftarranged forwardlyof said Vertically disposed shaft having a coaxial feed dlllllllarranged at each end thereof for free rotation:

with respect thereto, and means for driving:

said shaft and feed drums from said motor" comprising a planetary gearreduction dev ce. 1 Signed at Chicago, and State of Illinois, this 9thday of Septemin the county of Cook her A. D. 1926.

GEORGE BODIVN.

